Receiver for automatic telegraphic systems.



J. GELL. RECEIVER FOR AUTOMATIC TELEGRAPHIG SYSTEMS. APPLICATION FILED JAE. 30, 1911. RENEWED FEB. 21, 1913.

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J. GELLJ RECEIVER FOR AUTOMATIC TELEGRAPHIG SYSTEMS. APPLICATION FILED JAN. 30, 1911. RENEWED FEB. 21, 1913.

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JOHN GELL, OF LONDON, ENGLAND.

RECEIVER FOR AUTOMATIC TELEGRAPHIC SYSTEMS.

Specification of Letters Patent.

Patented Sept. 30,1913.

Application filed. January 30, 1911, Serial No. 605,655. Renewed February 21, 1913. Serial No. 750,043.

To all whom it may concern: 7

Be it known that I, JOHN GELL, citizen of the United States, residing at London, England, have invented certain new and useful Improvements in Receivers for Automatic Telegraphic Systems, of which the following is a specification.

The invention relates to telegraphic receiving instruments generally known as Morse or Wheatstone receivers, and it consists in the features and combination and arrangement of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawings Figure 1 is a vertical sectional view of a portion of the instrument; Fig. 2 is a plan view of the parts shown in Fig. 1; Fig. 3 is a horizontal sectional view of the parts shown in Fig. 1 substantially along the line 3-3 of Fig. 1; Fig. 4 is a front View of a part of the instrument; Fig. 5 is a detail view of the marking wheel and its mounting in connection with the armature. Fig. 6 is a View of a detail. I

One object of the invention is to so mount the armature and magnets that they will be firmly supported, but yet capable of being adjusted as a Whole to give neutral, marking or spacing bias, the adjustmentbeing effected in a simple and positive manner.

A further object of the invention is to pre sent such an organization and arrangement of parts that the cont-act points will be readily accessible to facilitate adjustment while the tape is still passing forward through the instrument.

In the drawings, 1 is the marking wheel which, like in the ordinary Wheatstone receiver, is supplied with ink by a feeding wheel or disk 2, which dips into a supply of ink in a tank 3. The marking wheel is made to contact with the tape 4 which is directed over guide wheel 5, 6, and between fixed guide pins 7 and 8. The marking wheel, as shown in Figs. 2 and 5, is carried by a shaft 9 having a hearing at one end in the frame at 10 to have slight oscillating movement, said shaft being rotated through any suitable gearing of which one member is shown at 11 driven from a train of gears represented in Fig. 1. The shaft is embraced by an arm 12 having arecess to receive the same, and by a spring 13 carried by the arm 12, said arm being mounted on an armature shaft 14: which carries the armatures 15, 16, which are influenced by the pole pieces 17, 18, 19, 20 of the electromagnets 21, 22.

The armature shaft, at its upper end, bears in a bracket 23 fixed by screws 24 to the top plate 24:, to which the electromagnets are secured, the said bracket 23 having a central rounded or journal portion 25 hearing in a circular opening in a bracket 26 fixed by screws 27 to the casing. The armature shaft at its lower end is j ournaled, as will be hereinafter described.

The electro-magnets, at their lower ends, are carried by a platform 26 having a journal 27 bearing in the base 28 of the instrument, said platform having a tail piece 29 borne upon by an adjusting screw 30 passing through a block 31 mounted on the casing, the platform being drawn one way by a spring 32, holding its tail piece against the end of the screw. This platform as shown in Fig. 1, affords a bearing for the lower end of the armature shaft, and this bearing, together with the upper bearing for the armature shaft, are axially arranged in respect to the upper and lower journals of the magnet supporting frame. By turning the screw one way, the platform is turned together with the magnets and the upper plate, this movement taking place about the armature shaft which, as above mentioned, is arranged axially of the journals of the magnet supporting frame, and thus the adjustment of this frame with its magnets does not affect the armature shaft. The platform is further connected with the upper plate by the pillars 33, so that the whole structure consisting of the platform, the upper plate and the magnets, moves as one body. In this action the platform turns with its lower journal in the base plate, while the upper part of the structure turns in the bearing bracket 26, by its ournal 25 located in the bearing opening of said bracket.

The adjustable contacts 3 1, 35 are mounted in blocks 36 mounted on the base or frame of the machine upon suitable insulation. The contacts have collars or heads 37 provided with openings to receive an adjusting key by which the contacts may be turned for adjustment, their screw threaded stems or shanks bearing in the boxes and advancing or retracting the contacts accord ing as the stem is turned one way or the other. When adjusted, the contacts are locked in position by the set screws 38 clamping the members of the split box about the threaded stem of the contact. These contacts act in connection with a contact 39 carried by the lower armature, and they control the local sounder or other circuit. They also act as mechanical stops for limiting' the movement of the armature to prevent contact thereof with the magnet pole pieces, and to limit also the movement of the marking wheel in relation to the tape. These contacts, it will be seen, are arranged at a point readily accessible for adjustment, being just within the wall of the casing so that by removing or lowering a door 40 in the side wall of the casing, the contacts are exposed to view, and may be reached for adjustment without stopping the apparatus from operation. Fig. 4 shows the door removed and the contacts exposed.

By adjusting the platform, the magnets, with their pole pieces, may be adjusted to control the contact 39 for neutral, marking or spacing bias without altering the relation between the marking wheel and the tape, the adjustment of the magnet supporting frame taking place around the axis of the armature shaft because of the axial relation of said shaft to the trunnions of the magnet supporting frame. The horseshoe magnets are shown at 41, for polarizing the armatures.

I claim as my invention:

1. In combination in an instrument of the class described, a frame or casing, supporting means journaled in the casing, electro-magnets carried by said supporting means, an armature shaft journaled in the supporting means, a marking wheel connected with the armature shaft, contacts mounted on the casing and means for adjusting the supporting means, substantially as described.

2. In combination in an instrument of the class described, a frame or casing, a plat form journaled therein, electro-magnets supported on the platform, an upper therefor, a connection between the armature V shaft and the marking wheel shaft, means for adjusting the platform, and contacts mounted on the frame, substantially as described. r

3. In combination in an instrument of the class described, a casing or frame, a platform journaled therein, electro-magnets on the platform, an upper plate connected with the magnets and having a journal axially in line with the lower'journal of the platform, an upper bracket having a bearing for the upper journal, an armature shaft journaled in the platform and in the upper bracket and axially in line with the journals thereof, said platform having an extension, an adjusting screw acting thereon for adjusting the platform and contacts or stops mounted on the casing cooperating with a contact or a stop on the armature shaft.

4. In combination a frame or casing, electro-magnets, a support therefor having trunnions by which the support may be turned, an armature shaft journaled axially in line with said trunnions, a marking wheel, a connection between the armature shaft and the marking'wheel, stops or contacts on the frame, and a stop or contact on the armature shaft to engage the stops or contacts on the frame, and means for adjusting the support of the magnets, substantially as described.

In testimony whereof, I affix my in presence of two Witnesses.

JOHN GELL.

signature lVitnesses:

W'AL'rER DONALDSON, BENNETT S. Jones.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 1). G. 

